Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ffa05cc4448b5b…

MALICIOUS

PDF

69.6 KB Created: 2021-03-23 01:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 493d7a5a7975f409a9d361a96511cb82 SHA-1: fdbc03eb9c4bb13430ad2cdcbd776e4a0710a11f SHA-256: a6ffa05cc4448b5bde4caadd95414464e3381d1a6728369c6630365195fa7310
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a CV example, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/award?keyword=cv+exemple+algerie+pdf PDF link annotation
    • http://bobejitamatu.iblogger.org/anydesk_mac_10._9._5.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/jukanurixawafifibudid.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/chemistry_book_10th_grade.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/fraud_examiners_manual.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/kosuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_603835fed7c8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_604157c20a43a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_2541dc5e249449a9a3a87f37de76da4f.pdf?index=trueIn PDF document text
    • http://nededujimusa.rf.gd/what_does_a_public_relations_intern_do.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_ce4d75409fc04601a89883847223b2cb.pdf?index=trueIn PDF document text
    • http://kidojudal.epizy.com/checkbook_register_template_free_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732458ca-ab5f-4dbc-bbcc-68b52f850bdf/14932185609.pdfIn PDF document text
    • http://tunivepusage.epizy.com/rockwell_model_20_vertical_band_saw_manual.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_74f1ba86e4024bd1b7511ca6ed630666.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_cf971411081d4b0aa045e68330c12d2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cda3f8d-da45-4e76-b22c-19f8602f3ffe/microlife_blood_pressure_monitor_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30543645-c4d9-4238-91fd-ff44a025e0f1/planet_dd_alignment_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a114a482-0154-4f52-90ad-bd535a10293d/15496962969.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/sesugixetu.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_d049a73babc64271994aa549d80fbc99.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6ef398-5489-4e80-99ab-bc5f8ab11504/common_core_math_standards_grade_6.pdfIn PDF document text
    • http://kebanibaru.epizy.com/29074966301.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD075 5216 bytes
SHA-256: d2d5f58728bf61c5e47113ca35a3183f1bd003df4b48fb768ddfcc53704300ad
font_01_sfnt_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 11556 bytes
SHA-256: 686e94b3158d627c87b514b16bfadadae81c762a1a8f8def1c63460f55ae6aeb

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